fix copy/paste typo

diff --git a/libs/ardour/audio_unit.cc b/libs/ardour/audio_unit.cc
index b08d122e7efd387dec93f5f87270c8ec608065c3..25c243ccdbff242f03ed88ed1d001fd1040865a0 100644 (file)
--- a/libs/ardour/audio_unit.cc
+++ b/libs/ardour/audio_unit.cc
@@ -1346,8 +1346,8 @@ AUPlugin::can_support_io_configuration (const ChanCount& in, ChanCount& out, Cha
        if (!found && imprecise) {
                /* try harder */
                for (vector<pair<int,int> >::iterator i = io_configs.begin(); i != io_configs.end(); ++i) {
-                       int possible_in = io["audio_in"];
-                       int possible_out = io["audio_out"];
+                       int32_t possible_in = i->first;
+                       int32_t possible_out = i->second;
 
                        assert (possible_in > 0); // all other cases will have been matched above
                        assert (possible_out !=0 || possible_in !=0); // already handled above